桂林电子科技大学学报Issue(5)：482-488,7.DOI:10.16725/j.1673-808X.2022336
Ca(Al0.5Nb0.5)O3调控铌酸钾钠基陶瓷的结构和光介电响应性能研究
Structure and photodielectric response of potassium-sodium niobate based ceramics modified by Ca(Al0.5Nb0.5)O3 component
摘要
Abstract
The(1-x)(K0.5Na0.5)NbO3-xCa(Al0.5Nb0.5)O3(KNN-xCAN,0.02 ≤ x≤ 0.08)perovskite ceramics were prepared by solid phase synthesis method.With the increase of CAN doping content,the phase structure of ceramic samples changes to the symmetric structure,the ferroelectric state transforms from the normal ferroelectric to the relaxor ferroelectric state,and the grain size gradual-ly decreases.The increase of dielectric constant and dielectric loss caused by illumination.The sample at x=0.03 shows significant photodielectric response,and its dielectric tunability of 663％can be obtained at 365 nm ultraviolet light and test frequency of 80 Hz.With the increase of test frequency,the dielectric tunability decreases rapidly and remains at about 6％after 100 kHz.When the light source is switched,an obvious capacitive switching characteristics can be observed,and is reversible.These research provide experi-mental basis for the development of new non-contact optical capacitor and optical switch based on KNN ceramics.关键词
铌酸钾钠(KNN)/光介电响应/可调谐性/光开关Key words
potassium-sodium niobium(KNN)/photodielectric response/tunability/optical switch分类
化学化工引用本文复制引用
曹志杰,杨玲,许积文,周昌荣,王华..Ca(Al0.5Nb0.5)O3调控铌酸钾钠基陶瓷的结构和光介电响应性能研究[J].桂林电子科技大学学报,2024,(5):482-488,7.基金项目
国家自然科学基金(52062007) （52062007）
广西自然科学基金(2021GXNSFAA220020) （2021GXNSFAA220020）
